Table 1 Clinical-pathological characteristics

Gender

0.536

0.778

 Male

142 (59.9%)

56 (58.9%)

97 (59.1%)

50 (61.0%)

 Female

95 (40.1%)

39 (41.1%)

67 (40.9%)

32 (39.0%)

Age, year

58.6 ± 11.0

55.2 ± 11.9

0.001

55.8 ± 10.6

55.5 ± 10.3

0.758

BMI, kg/m²

22.7 ± 2.6

23.3 ± 2.8

0.457

22.8 ± 2.7

23.1 ± 2.5

0.623

ASA physical status

0.145

0.636

 I

85 (35.9%)

31 (32.6%)

52 (31.7%)

23 (28.0%)

 II

122 (51.5%)

52 (54.7%)

88 (53.7%)

49 (59.8%)

 III

30 (12.7%)

12 (12.6%)

24 (14.6%)

10 (12.2%)

T stage

0.614

0.828

 T1

28 (11.8%)

11 (11.6%)

19 (11.6%)

10 (12.2%)

 T2

66 (27.8%)

26 (37.4%)

46 (28.0%)

22 (26.8%)

 T3

89 (37.6%)

33 (34.7%)

65 (39.7%)

32 (39.0%)

 T4a

54 (22.8%)

25 (26.3%)

34 (20.8%)

18 (22.0%)

N stage

0.559

0.814

 N0

94 (39.7%)

36 (37.9%)

65 (39.6%)

32 (39.0%)

 N1

71 (30.0%)

30 (31.6%)

49 (29.9%)

24 (29.3%)

 N2

45 (19.0%)

17 (17.9%)

29 (17.7%)

14 (17.1%)

 N3

27 (11.4%)

12 (12.7%)

21 (12.8%)

12 (14.6%)

Clinical TNM stage

0.468

0.889

 I

28 (11.8%)

11 (11.6%)

19 (11.6%)

9 (11.0%)

 II

79 (33.3%)

26 (27.4%)

54 (32.9%)

18 (22.0%)

 III

130 (54.9%)

58 (61.1%)

91 (55.5%)

55 (67.0%)

Histology

0.755

0.789

 Differentiated

182 (76.8%)

72 (75.8%)

123 (75.0%)

63 (76.8%)

 Undifferentiated

55 (23.2)

23 (24.2%)

41 (25%)

19 (23.2%)

 Specimen length^, cm

14.6 ± 3.8

14.1 ± 3.2

0.550

14.4 ± 3.6

14.2 ± 3.3

0.592

 Preoperative s-CEA, ng/ml

2.6 ± 0.5

2.9 ± 0.6

0.345

2.7 ± 0.5

2.9 ± 0.6

0.355

 Preoperative s-CA199, U/ml

14.6 ± 2.6

15.1 ± 2.8

0.789

14.9 ± 2.7

15.2 ± 2.8

0.794

 Preoperative s-CA125, U/ml

11.4 ± 2.1

11.9 ± 2.3

0.514

11.6 ± 2.2

11.8 ± 2.3

0.518